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skew ray

noun
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Definition of skew ray

1 : a ray in a symmetrical optical system that is neither parallel to nor intersecting the axis
2 : a ray of a prism not perpendicular to the edge

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“Skew ray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/skew%20ray. Accessed 15 Jan. 2021.

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